ADSP-214xx SHARC Processor Hardware Reference vii
Contents
IOP Effect Latency ................................................................ 2-49
IOP Throughput ................................................................... 2-50
Programming Model ................................................................... 2-50
General Procedure for Configuring DMA .............................. 2-51
EXTERNAL PORT
Features ....................................................................................... 3-2
Pin Descriptions ........................................................................... 3-3
Pin Multiplexing ..................................................................... 3-3
Register Overview ......................................................................... 3-3
Clocking AMI/SDRAM ................................................................ 3-5
Clocking AMI/DDR2 ................................................................... 3-6
External Port Arbitration ............................................................... 3-7
Functional Description ................................................................. 3-7
Operating Mode .................................................................... 3-10
Arbitration Freezing .......................................................... 3-10
Asynchronous Memory Interface ................................................. 3-10
Features ................................................................................. 3-11
Functional Description .......................................................... 3-11
Asynchronous Reads ......................................................... 3-12
Asynchronous Writes ......................................................... 3-12
Parameter Timing ............................................................. 3-14
Idle Cycles ........................................................................ 3-14
Address Mapping .............................................................. 3-14
Operating Modes ................................................................... 3-15
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